If experiencing this problem… try this solution, Missing information in the printed label, Missing print on left or right side of the label – Rice Lake Datamax-ONeil M-Class User Manual
Page 98: No power (all indicator lights are ‘off”)

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M-Class
If experiencing this problem…
Try this solution…
Missing information in the printed
label:
• Check the label format for character placement outside the dimensions of the label; all
row/column values must allow enough space for the height/length of the characters and
bar codes to be printed within the format size.
• The available memory may have been exceeded by the memory requirement of the
label format. Try reducing the memory allocated to either the internal module or
scaleable font caches; non-display printers see Section 4.5.2, display printers see
Section 5.1.5
• If using serial communications, ensure that the interface cable meets the requirements
found in Section 3.1.2.
Missing print on left or right side
of the label:
Information may be formatted outside the label dimensions. Check your software
program label size. For display printers also check the values in the menu for Print
Control / Column Offset and Print Control / Custom Adjustments / Column Offset; see
Section 5.1.3.
No power (all indicator lights are
‘Off”):
• Verify that the AC power cord connection has been made at both the outlet and the
printer; also, ensure the power switch is ‘On’.
•
Verify that the AC outlet is functioning, or try moving the printer to another AC circuit.
• The AC cord may be damaged; replace it.
• The line fuse may be blown; call for service.
Nothing is printing (labels advance
normally, but no image is printed):
Examine the used ribbon for an image:
If there is an image on the used ribbon:
Verify that the ribbon was properly loaded per Section 3.4.
If properly loaded, the wrong coating configuration was used. (To verify the inked side,
press the adhesive backing of a label against the ribbon surface. Ink will only lift from
the coated side of the ribbon.) Clean the printhead (see Section 6.1); then replace the
ribbon with the correct type for the printer, Section 3.4.
If there is no image on the used ribbon:
• Print any Internal Test Label; non-display printers see Section 4.8, display printers see
Section 5.3. If an image printed, then check the protocol and port settings for both the
printer and host. These must match.
• The heat setting may be too low. Make an adjustment in the software program or
through the Front Panel.
• The media/ribbon combination may be incorrect. Contact a Media Representative.
• The printhead or printhead cable(s) may be loose; power ‘Off’ the printer then
reconnect.